Returning the glitch Pokémon to its original self

To return the unstable Rhydon-glitch Pokémon hybrid back to just the original glitch Pokémon, it must be stabilized. To stabilize an unstable hybrid Pokémon, a Pokémon can be evolved (in the way the glitch Pokémon would), traded to Pokémon Stadium 2, or deposited and withdrawn from Pokémon Day Care. However, the glitch Pokémon will still have the nickname "RHYDON" after being stabilized. This allows these glitch Pokémon to learn every move Rhydon can. Once stabilized, the Pokémon can be traded to the Generation II games.

Methods of avoiding the Rhydon glitch

Obtaining a glitch Pokémon with a Pokédex number less than 152 which is not 000.

Obtaining a glitch Pokémon which doesn't show its Pokédex entry upon capture.

Activating the flag which is the same as the obtained flag for the glitch Pokémon as a method of avoiding the Pokédex entry. For example, Pokédex entries belonging to glitch Pokémon in the No. 000 family (such as Missingno.) will only appear upon capture if the player has not encountered Cubone.